Today's biggest winners and losers in the stock market.

On this episode of Stock Movers:

- Activist investor Elliott Investment Management has made a multibillion-dollar investment in Synopsys (SNPS) and plans to push for changes at the chip-design software maker, according to people familiar with the matter who asked not to be identified because it was private.

- Shares in DraftKings and Flutter (FLUT) erase earlier losses to gain after the Wall Street Journal reported that US senators are set to introduce bipartisan legislation to ban sports bets on prediction markets.

- A group of Senate Democrats asked FCC Chairman Brendan Carr to investigate the foreign money funding Paramount’s bid takeover bid for Warner Bros. Discovery (WBD), Semafor reports, citing the lawmakers’ letter to Carr.